Green tea is included due to its amazing antioxidant potential and its researched effects on many chronic diseases leading to ageing. The relative antioxidant level of green tea is much higher compared to black tea and coffee whilst the caffeine content is greatly diminished in the extraction process. The maximum amount of caffeine that could be expected from this amount of green tea without extraction would be under approximately 3mg per serve (or about 1/50th of a small brewed coffee!), but with our extract the amount would be negligible. Healthy Ageing Essentials should be completely fine for a caffeine sensitive individual.